Creates a category object containing the specified actions, options, placeholder text used when previews aren’t shown, and summary format string.
- iOS 12.0+
- macOS 10.14+
- Mac Catalyst 13.0+
The unique identifier for the category. Each category that your app uses must have a unique identifier. Don’t specify an empty string.
The actions to display when notifications of this type are delivered. When minimal space is available, only the first two actions in the array are displayed. You may specify
nilfor this parameter if you don’t want to display custom actions.
The intent identifier strings that you want to associate with notifications of this type. The Intents framework defines constants for each type of intent that you can associate with your notifications.
A placeholder string to display when the user has disabled notification previews for the app. Include the characters
%u(the only supported formatting characters) in the string to represent the number of notifications with the same thread identifier. For example, the string “
%u Messages” becomes “
2 Messages” when there are two messages.
To specify different strings for the singular and plural cases, use the
User Notification String(for Key: arguments:)
NSStringto specify the value for this parameter. The key passed to that method contains the identifier of an entry in a
.stringsdictproperty list of your project. A strings dictionary lets you specify different formatted strings based on the language rules, and is as described in Internationalization and Localization Guide.
A format string for the summary description used when the system groups the category’s notifications.
Additional options for handling notifications of this type. For a list of possible values, see